Okay everyone I didnt want to ask in fear of what may happen to me but whatever i'm just going to ask. I appologize in advance if this is a stupid question. Feel free to bash and make fun of me as much as you want. What does ATF mean?

It used to be the crowd would shout "A T F!!!" during the second break of the song. In recent years it was always fun to see who else would know when to yell because you knew they were die hards like you.